#include<stdio.h>
#include<stdlib.h>
#include<string.h>
#include<unistd.h>
#include<arpa/inet.h>
#include<sys/socket.h>
#define BUFFSIZE 1024
void error_handling(char* message);

int main(int argc,char* argv[])
{
    int sock;
    struct sockaddr_in serv_addr;
    char message[BUFFSIZE];
    int str_len;
    int idx =0;
    int read_len = 0;


    if(argc != 3)
    {
        printf("Usge : %s <IP> <port>\n",argv[0]);
        exit(1);
    }

    sock = socket(PF_INET,SOCK_STREAM,0);
    if(sock == -1)
	{
		error_handling("socket() error");
	}

    memset(&serv_addr,0,sizeof(serv_addr));
    serv_addr.sin_family = AF_INET;
    serv_addr.sin_addr.s_addr = inet_addr(argv[1]);
    serv_addr.sin_port = htons(atoi(argv[2]));

    if(connect(sock,(struct sockaddr*)  &serv_addr,sizeof(serv_addr))==-1)
    {
        error_handling("connect() error");
    }
    else
    {
        printf("Connecting ... \n");
    }
    
    while(1)
    {
        fputs("Input message(Q to qiut)",stdout);
        fgets(message,BUFFSIZE,stdin);
        if(!strcmp(message,"q\n")||!strcmp(message,"Q\n"))
            break;

        write(sock,message,strlen(message));
        str_len = read(sock,message,BUFFSIZE -1);
        printf("%d\n",str_len);
        message[str_len] = 0;
        printf("message from server :%s\n",message);
    }
    
    close(sock);
    return 0;  
}

void error_handling(char * message)
{
	printf("%s",message);
	exit(1);
}
